title: Surface-enhanced Raman scattering of patterned copper nanostructure electrolessly plated on arrayed nanoporous silicon pillars.
abstract: A new synthesized composite structure, a patterned copper/silicon nanoporous pillar array (Cu/Si-NPA) made by depositing Cu on Si-NPA using an immersion plating method, can be used as a surface-enhanced Raman scattering (SERS) substrate. Its surface component and morphology were analyzed by x-ray diffraction and field-emission scanning electron microscopy, respectively. It was found that the surface was Cu with two kinds of crystal structures: a continuous film composed of Cu nanocrystallites covering the Si-NPA, and a quasi-regular, interconnected network composed of loop-chains of Cu crystallites, with the size in the range of several tens of nanometer to 300 nm, surrounding the porous Si pillars. The composite structure is strongly SERS active using rhodamine 6G as probe molecules, which is mainly due to the patterned hierarchical Cu structure.
authors.affiliation: Department of Mathematics and Information Science, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, People's Republic of China. gingerwfj@yahoo.com.cn
authors.forename: Wei Fen
authors.initials: WF
authors.lastname: Jiang
authors.forename: Wen Wen
authors.initials: WW
authors.lastname: Shan
authors.forename: Hong
authors.initials: H
authors.lastname: Ling
authors.forename: Yu Sheng
authors.initials: YS
authors.lastname: Wang
authors.forename: Yan Xia
authors.initials: YX
authors.lastname: Cao
authors.forename: Xin Jian
authors.initials: XJ
authors.lastname: Li